Merge shapes/delete obscured shapes

[wasa]

I've noticed that alchemy can quickly become bogged down depending on the tools used
Since an active merging of shapes that are the same color and transparency may not be possible, having a button to calculate this

Obscured shapes, shapes are aren't affecting the image we see could be removed (somewhat like the limit affect) this would also free memory and speed performance. Since alchemy can neither undo or edit/move shapes by design, it really makes sense to remove these shapes
For transparent shapes (ones with a fill value) could be removed if the change in color or shade is less than x amount.

Cheers!

[Orange]

Thats a very good idea. I cannot work long with alchemy because it slows down fast when i make use of Pull-shapes for example. Thats pretty annoying and keeps me from working with alchemy ... (as well as the save-transparency issue which seems not to be solved )